Submission #758940

#	Time	Username	Problem	Language	Result	Execution time	Memory
758940		ridiche	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	0 / 100	1 ms	340 KiB

Main

#include <iostream>
#define INT_MAX 2147483647

using namespace std;

int a[200005];
int cr[200005], cn[200005], ce[200005];
int dr[200005], dn[200005], de[200005];

int main()
{
	int n;
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		cin >> a[i];
	}
	cn[0] = a[0];
	for (int i = 1; i < n; i++)
	{
		if (a[i] > cn[i - 1])
		{
			cr[i] = 0;
			cn[i] = a[i];
			ce[i] = 0;
		}
		else
		{
			cn[i] = cn[i - 1] + 1;
			ce[i] = cn[i] - a[i];
			cr[i] = cr[i - 1] + max(0, ce[i] - ce[i - 1]);
		}
	}
	dn[n - 1] = a[n - 1];
	for (int i = n-2; i >= 0; i--)
	{
		if (a[i] > dn[i + 1])
		{
			dr[i] = 0;
			dn[i] = a[i];
			de[i] = 0;
		}
		else
		{
			dn[i] = dn[i + 1] + 1;
			de[i] = dn[i] + a[i];
			dr[i] = dr[i + 1] + max(0, de[i] - de[i + 1]);
		}
	}
	int r = INT_MAX;
	for (int i = 0; i < n; i++)
	{
		r = min(r, cr[i] + dr[i] - min(ce[i], de[i]));
	}
	cout << r;
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 60